CN104916446A - Active graphene electrode material for super capacitor and preparation method of active graphene electrode material - Google Patents
Active graphene electrode material for super capacitor and preparation method of active graphene electrode material Download PDFInfo
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- graphite alkene
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 39
- 239000007772 electrode material Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000003990 capacitor Substances 0.000 title abstract description 8
- 239000012190 activator Substances 0.000 claims abstract description 12
- 239000012298 atmosphere Substances 0.000 claims abstract description 7
- 230000009467 reduction Effects 0.000 claims abstract description 7
- 230000004913 activation Effects 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims abstract description 3
- -1 Activated Graphite alkene Chemical class 0.000 claims description 60
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 30
- 238000001035 drying Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 21
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 20
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 10
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 8
- 239000011592 zinc chloride Substances 0.000 claims description 4
- 235000005074 zinc chloride Nutrition 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 1
- 238000009776 industrial production Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000843 powder Substances 0.000 description 10
- 238000005119 centrifugation Methods 0.000 description 9
- 238000002484 cyclic voltammetry Methods 0.000 description 9
- 239000008367 deionised water Substances 0.000 description 9
- 230000007935 neutral effect Effects 0.000 description 9
- 238000009413 insulation Methods 0.000 description 8
- 230000004044 response Effects 0.000 description 8
- 238000010792 warming Methods 0.000 description 8
- 239000011149 active material Substances 0.000 description 6
- 239000012299 nitrogen atmosphere Substances 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 239000006258 conductive agent Substances 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 150000001721 carbon Chemical group 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical compound C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910003472 fullerene Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002847 impedance measurement Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/24—Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/34—Carbon-based characterised by carbonisation or activation of carbon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/36—Nanostructures, e.g. nanofibres, nanotubes or fullerenes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nanotechnology (AREA)
- Manufacturing & Machinery (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention provides an active graphene electrode material for a super capacitor and a preparation method of the active graphene electrode material. The preparation method of the active graphene electrode material is characterized in that the preparation method comprise the following steps that: graphene oxide mixed with an activator is subjected to reduction and activation in a protective atmosphere under a certain temperature range; and obtained substances are washed, filtered and dried, so that the active graphene can be obtained. The preparation method of the active graphene has high production efficiency, and is suitable for large-scale industrial production of the active graphene. The specific capacitance of the active graphene which is obtained through adopting the preparation method can achieve 193F/g under 0.05A/g current density, and can achieve 150F/g under 2A/g current density. The active grapheme which is obtained through adopting the preparation method is an ideal electrode material for the super capacitor.
Description
Technical field
The invention belongs to super capacitor material technical field, be specifically related to a kind of Activated Graphite alkene electrode material for ultracapacitor and preparation method thereof.
Background technology
Ultracapacitor, also known as electrochemical capacitor, is a kind of novel energy-storing device between traditional physical capacitor and secondary cell.Because ultracapacitor has relative to traditional secondary battery, power density is high, the advantage such as have extended cycle life, and its power supply as electronic equipment and automobile is with a wide range of applications.
Graphene (graphene) be a kind of by carbon atom with sp
2the hexangle type of hybridized orbit composition is the flat film of honeycomb lattice, it only has the thickness of a carbon atom, the hardlyest (pressure of about two tons of heavy articles can be born at present artificial obtained the thinnest (thickness 0.335nm) is also, and be unlikely to rupture) nano material, be considered to the basic structural unit of fullerene, carbon nano-tube and graphite.
Graphene has higher specific area, and (theoretical specific surface area is up to 2630m
2/ g) and high conductivity (resistivity is about 10
-6Ω cm), therefore make the material based on Graphene become extremely promising energy storage active material, especially as the electrode material of double electric layers supercapacitor.
CN102070140A(publication date on May 25th, 2011) disclose and a kind ofly utilize the reaction at high temperature of highly basic and carbon, further chemical treatment is carried out to the graphene powder that heat treatment or microwave irradiation obtain, rapidly, erode away the micropore of nanometer scale in large quantity at graphenic surface, thus greatly improve the method for its specific area.
CN102496475A(publication date on June 13rd, 2012) disclose the method (namely preparing the method for Graphene with highly basic as activator) adopting CN102070140A to protect and prepare specific area and be greater than 2600m
2the Activated Graphite alkene of/g, but when the Activated Graphite alkene adopting the method to prepare is applied to electrode material for super capacitor, its biggest quality ratio capacitance is only 150F/g.
Therefore, the low cost preparation technology of height ratio capacity, high rate capability Activated Graphite alkene urgently develops.
Summary of the invention
The object of the invention is to overcome the problem that current Graphene class material preparation process is complicated, production cost is high and productive rate is on the low side, provide a kind of preparation method of the Activated Graphite alkene electrode material for ultracapacitor, namely a step reduction is adopted to prepare Activated Graphite alkene with activation method, the method, there is production cost low, be easy to the advantage realizing large-scale industrial production.The Activated Graphite alkene adopting this one-step method to prepare, there is higher conductivity, larger specific area and bulk density simultaneously, the ultracapacitor making electrode with it has excellent high rate performance, and namely it still can keep higher energy density under high current density.
The invention provides a kind of Activated Graphite alkene electrode material for ultracapacitor, it is characterized in that: in protective atmosphere, graphene oxide carried out reduce simultaneously and activate, obtain Activated Graphite alkene electrode material through washing, filtration, drying.This Graphene electrodes material by with phosphoric acid, potassium hydroxide, NaOH, sulfuric acid, zinc chloride one or more make activator, graphene oxide is at high temperature synchronously carried out reduction and activation obtains; Resulting materials has larger specific capacity and excellent high rate performance.
Present invention also offers the preparation method of described Activated Graphite alkene electrode material, the method comprises the steps:
(1) first crystalline flake graphite is made graphene oxide by chemical method, then graphene oxide is mixed with a certain amount of activator, after reaction terminating, carry out drying;
(2) mixture of graphene oxide and activator is carried out high temperature reduction and activation processing under an inert atmosphere;
(3) the product washed with de-ionized water above-mentioned high-temperature process obtained, to neutral, then carried out centrifugation and drying, is obtained Activated Graphite alkene powder;
The preparation method of Activated Graphite alkene electrode material provided by the invention, the chemical method described in step (1) comprise in Brodie method, Staudenmaier method, Hummers method one or more; Described activator be phosphoric acid, potassium hydroxide, NaOH, sulfuric acid, zinc chloride one or more; The mass ratio of graphene oxide and activator is 100:1 to 1:100; Baking temperature is 60 ~ 180 DEG C.Inert atmosphere described in step (2) is one or more in nitrogen, argon gas, helium, and reduction is 300-1000 DEG C with the temperature of activation processing, and the processing time is 0.5-10h.
Activated Graphite alkene electrode material for super capacitor provided by the present invention has higher ratio capacitance and excellent high rate performance.
Advantage of the present invention: Activated Graphite alkene electrode material provided by the invention has higher ratio capacitance and excellent high rate performance, its preparation method has the high feature with being easy to amplify of efficiency, is suitable for the large-scale industrial production of Activated Graphite alkene.
Accompanying drawing explanation
Fig. 1 is the XRD collection of illustrative plates of Activated Graphite alkene electrode prepared by the embodiment of the present invention 1;
Fig. 2 is the cyclic voltammetry curve of Activated Graphite alkene electrode prepared by the embodiment of the present invention 1;
Fig. 3 is the AC impedance curve of Activated Graphite alkene electrode prepared by the embodiment of the present invention 1;
Fig. 4 is the charging and discharging curve of Activated Graphite alkene electrode prepared by the embodiment of the present invention 1;
Fig. 5 is the high rate performance curve of Activated Graphite alkene electrode prepared by the embodiment of the present invention 1;
Fig. 6 is the XRD collection of illustrative plates of Activated Graphite alkene prepared by the embodiment of the present invention 2;
Fig. 7 is the cyclic voltammetry curve of Activated Graphite alkene electrode prepared by the embodiment of the present invention 2;
Fig. 8 is the XRD collection of illustrative plates of Activated Graphite alkene prepared by the embodiment of the present invention 3;
Fig. 9 is the cyclic voltammetry curve of Activated Graphite alkene electrode prepared by the embodiment of the present invention 3.
Embodiment
The following examples will be further described the present invention, but not thereby limiting the invention.
Embodiment 1
Adopted by 3.5g the standby graphene oxide of Hummers legal system to join in the 100ml concentrated sulfuric acid to mix, then add the phosphoric acid of 20ml30%, question response carries out drying after stopping.Desciccate is warming up to 400 DEG C in a nitrogen atmosphere, insulation 6h, by washed with de-ionized water to neutral, after then carrying out centrifugation and drying, obtains Activated Graphite alkene powder.
The XRD test result of Activated Graphite alkene as shown in Figure 1.XRD test result shows that graphene oxide has been reduced and has activated.By Activated Graphite alkene in active material: conductive agent: the ratio of binding agent=85:10:5 mixes, and makes electrode slice, then in 6M KOH electrolyte, carry out cyclic voltammetry, test result as shown in Figure 2.100mV/s sweep speed under, the cyclic voltammetry curve shape of this electrode, still close to rectangle, illustrates that the Activated Graphite alkene adopting the present embodiment method to prepare still shows good capacitance characteristic under this potential scan rate.Ac impedance measurement shown in Fig. 3 shows that this electrode has lower ohmmic drop.Constant current charge-discharge result shows that Activated Graphite alkene has higher specific capacity (Fig. 4).The ratio capacitance of Activated Graphite alkene under the current density of 0.05A/g reaches 193F/g, and the ratio capacitance under the current density of 2A/g reaches 150F/g.Figure 5 shows that the multiplying power property curve adopting galvanostatic charge/discharge to test the Activated Graphite alkene obtained.Along with the increase of discharge current density, ratio capacitance declines slowly.Particularly when current density brings up to 2000mA/g from 500mA/g, the ratio capacitance of Activated Graphite alkene does not almost reduce, and illustrates that the Activated Graphite alkene prepared by the present embodiment has excellent high rate performance.
Embodiment 2
Adopted by 3.5g the standby graphene oxide of Hummers legal system to join in the 100ml concentrated sulfuric acid to mix, then add the phosphoric acid of 20ml30%, question response carries out drying after stopping.Desciccate is warming up to 500 DEG C in a nitrogen atmosphere, insulation 6h, by washed with de-ionized water to neutral, after then carrying out centrifugation and drying, obtains Activated Graphite alkene powder.
The XRD test result of Activated Graphite alkene as shown in Figure 6.XRD test result shows that graphene oxide has been reduced and has activated.By Activated Graphite alkene in active material: conductive agent: the ratio of binding agent=85:10:5 mixes, and makes electrode slice, then in 6M KOH electrolyte, carry out cyclic voltammetry, test result as shown in Figure 7.In the cyclic voltammetry curve shape of sweeping fast bottom electrode of 100mV/s still close to rectangle, show that Activated Graphite alkene prepared by the present embodiment has desirable capacitance characteristic and excellent high rate performance.
Embodiment 3
Adopted by 3.5g the standby graphene oxide of Hummers legal system to join in the 100ml concentrated sulfuric acid to mix, then add the phosphoric acid of 20ml30%, question response carries out drying after stopping.Desciccate is warming up to 600 DEG C in a nitrogen atmosphere, insulation 6h, by washed with de-ionized water to neutral, then carries out centrifugation and drying obtains Activated Graphite alkene powder.
The XRD test result of Activated Graphite alkene as shown in Figure 8.XRD test result shows that graphene oxide has been reduced and has activated.By Activated Graphite alkene in active material: conductive agent: the ratio of binding agent=85:10:5 mixes, and is prepared into electrode slice, then in 6M KOH electrolyte, carry out cyclic voltammetry, test result as shown in Figure 9.In the cyclic voltammetry curve shape of sweeping fast bottom electrode of 100mV/s still close to rectangular configuration, show that Activated Graphite alkene prepared by the present embodiment has desirable capacitance characteristic and excellent high rate performance.
Embodiment 4
Adopted by 3.5g the standby graphene oxide of Hummers legal system to join in the 100ml concentrated sulfuric acid to mix, then add the phosphoric acid of 20ml30%, question response carries out drying after stopping.Desciccate is warming up to 300 DEG C in a nitrogen atmosphere, insulation 6h, by washed with de-ionized water to neutral, after then carrying out centrifugation and drying, obtains Activated Graphite alkene powder.By the Activated Graphite alkene of gained in active material: conductive agent: the ratio of binding agent=85:10:5 mixes, be prepared into electrode slice, then test in 6M KOH electrolyte, result shows that Activated Graphite alkene prepared by the present embodiment has desirable capacitance characteristic and excellent high rate performance.Embodiment 5
Adopted by 3.5g the standby graphene oxide of Hummers legal system to join in the 100ml concentrated sulfuric acid to mix, then add the phosphoric acid of 20ml30%, question response carries out drying after stopping.Desciccate is warming up to 1000 DEG C in a nitrogen atmosphere, insulation 6h, by washed with de-ionized water to neutral, after then carrying out centrifugation and drying, obtains Activated Graphite alkene powder.By the Activated Graphite alkene of gained in active material: conductive agent: the ratio of binding agent=85:10:5 mixes, be prepared into electrode slice, then test in 6M KOH electrolyte, result shows that Activated Graphite alkene prepared by the present embodiment has desirable capacitance characteristic and excellent high rate performance.Embodiment 6
Adopted by 5g the standby graphene oxide of Hummers legal system to join in the 100ml concentrated sulfuric acid to mix, question response carries out drying after stopping.Desciccate is warming up to 400 DEG C in a nitrogen atmosphere, insulation 6h, by washed with de-ionized water to neutral, after then carrying out centrifugation and drying, obtains Activated Graphite alkene powder.
Embodiment 7
Adopted by 5g the standby graphene oxide of Hummers legal system to join in the phosphoric acid of 50ml30%, question response carries out drying after stopping.Desciccate is warming up to 800 DEG C under helium atmosphere, insulation 6h, by washed with de-ionized water to neutral, then carries out centrifugation and drying obtains Activated Graphite alkene powder.
Embodiment 8
Adopted by 10g the standby graphene oxide of Hummers legal system to join in the potassium hydroxide of 100ml5mol/L, question response carries out drying after stopping.Desciccate is warming up to 700 DEG C under an argon atmosphere, insulation 6h, by washed with de-ionized water to neutral, then carries out centrifugation and drying obtains Activated Graphite alkene powder.
Above-described embodiment illustrates, adopts method involved in the present invention to prepare to have the Activated Graphite alkene electrode material compared with height ratio capacity and excellent high rate performance.
Claims (6)
1. for an Activated Graphite alkene electrode material for ultracapacitor, it is characterized in that: in protective atmosphere, graphene oxide carried out reduce simultaneously and activate, obtain Activated Graphite alkene electrode material through washing, filtration, drying.
2. according to the Activated Graphite alkene electrode material for ultracapacitor described in claim 1, it is characterized in that: one or more of employing phosphoric acid, potassium hydroxide, NaOH, sulfuric acid, zinc chloride make activator, graphene oxide carried out reduce simultaneously and activate.
3., as claimed in claim 1 for the preparation method of the Activated Graphite alkene electrode material of ultracapacitor, it is characterized in that, comprise the following steps:
(1) adopt chemical method to prepare graphene oxide, then add activator, after reaction terminating, carry out drying;
(2) desciccate that (1) obtains is placed in tube furnace, carries out reducing and activating under inert atmosphere protection;
(3) reduction activation product is carried out wash, filter and drying, obtain Activated Graphite alkene.
4. according to described in claim 3 for the preparation method of the Activated Graphite alkene electrode material of ultracapacitor, it is characterized in that: in step (1), described chemical method is one or more in Brodie method, Staudenmaier method, Hummers method; The mass ratio of graphene oxide and activator is 100:1 to 1:100; Baking temperature is 60 ~ 180 DEG C.
5. according to described in claim 3 for the preparation method of the Activated Graphite alkene electrode material of ultracapacitor, it is characterized in that: in step (2), the reduction of the mixture of graphene oxide and activator and active temperature range are 300-1000 DEG C.
6. according to described in claim 3 for the preparation method of the Activated Graphite alkene electrode material of ultracapacitor, it is characterized in that: in step (1), described activator is phosphoric acid, potassium hydroxide, one or more in NaOH, sulfuric acid, zinc chloride.
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| CN105752969A (en) * | 2016-02-29 | 2016-07-13 | 武汉理工大学 | Method for preparing polyatomic self-doped graphene by using natural porous and laminated vegetables |
| CN107017089A (en) * | 2017-04-01 | 2017-08-04 | 苏州海凌达电子科技有限公司 | The preparation method and applications of ultracapacitor nickel oxide combination electrode material |
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| CN103253658A (en) * | 2013-05-13 | 2013-08-21 | 常州第六元素材料科技股份有限公司 | Graphene with high volumetric specific capacitance and preparation method thereof |
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